Chapter 2 Hardware features
Page 2-4 MAN 0386
Sample tray area
The sample tray area is where the sample is added to the dispersion unit. Sample
feeds down the sample tray as it is vibrated. Three sizes of sample tray are available
for different applications. More details of the sample tray area are given below.
Status indicator
The status indicator illuminates in one of three colours when the dispersion unit is
powered up:
Green if the dispersion unit is functioning correctly and its cell has been
loaded into the optical bench (i.e. the dispersion unit is “active”).
Amber if the dispersion unit is functioning correctly but its cell has not been
loaded into the optical bench (i.e. the dispersion unit is at “standby”).
Red if the dispersion unit detects an error. If an error message does not appear
on the screen, selecting Configure-Accessories will display the dispersion
unit control dialogue which should show the error.
Sample area lid
The sample area lid is primarily a safety feature that reduces the sound emissions
from the dispersion unit. The lid must be locked using the central catch to ensure
that sound emissions are reduced to an adequate level.
The lid is interlocked so the dispersion unit automatically returns to standby mode
if it is opened during a measurement. Unless there is a hopper, it is therefore
important that the sample is added to the sample tray before the measurement is
started. With hopper instruments, the sample can be added to the hopper as the
measurement proceeds.
Rear panel
The rear panel contains all services and communication connectors for the disper-
sion unit. More details are given later in this chapter.
Sample exit port
This is the port where the sample leaves the dispersion unit. It is connected to the
air cell via a flexible tube. The tube must be removed from this port if the cell is to
be stored in the cell holder. This prevents damage to the ceramic outlet nozzle.
Air cell
The air cell is used to confine the sample as it passes through the analyser beam in
the optical bench. More details are given later in this chapter.
MAN0386-1.0 Scirocco 2000.book Page 4 Friday, March 16, 2007 4:15 PM
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